Understanding Numbers

Front

Natural Numbers

Back

Counting numbers starting from 1

Front

Whole Numbers

Back

Natural numbers + 0

Front

Integers

Back

Whole numbers + negatives

Front

Rational Numbers

Back

Fractions or ratios

Front

Irrational Numbers

Back

Non-repeating, non-terminating decimals

Front

Real Numbers

Back

All rational and irrational numbers

Front

Prime Numbers

Back

Divisible by 1 and itself

Front

Composite Numbers

Back

More than two factors

Front

Even Numbers

Back

Divisible by 2

Front

Odd Numbers

Back

Not divisible by 2